123415-45-2Relevant academic research and scientific papers
Bipyridyl ligand and preparation method thereof, ruthenium supramolecular self-assembly body containing bipyridyl ligand and preparation method and application of ruthenium supramolecular self-assembly
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Paragraph 0030-0036, (2020/08/18)
The invention provides a novel bipyridyl bidentate ligand and a preparation method thereof. The structural formula of the novel bipyridyl bidentate ligand is shown in the specification. The inventionfurther provides a ruthenium supramolecular self-assembly body of the ligand and a preparation method of the ruthenium supramolecular self-assembly body. The preparation method comprises the followingsteps: putting a prepared ruthenium receptor and a bipyridyl ligand into a container, adding a mixed solvent of methanol and dichloromethane in equal proportion, stirring for a period of time at roomtemperature, spin-drying the solution to a certain volume after the reaction is finished, slowly adding diethyl ether, and separating out solid powder, namely the ruthenium supramolecular self-assembly body containing the bipyridyl ligand. The self-assembly body is a novel ruthenium-containing self-assembly compound, and has a good inhibition effect on cancer tumor cell lines A549 and HepG-2.
Synthesis and spectral characterization of photoswitchable oligo(p-phenylenevinylene)-spiropyran dyad
Doddi, Siva,Ramakrishna, Bheerappagari,Venkatesh, Yeduru,Bangal, Prakriti Ranjan
, p. 56855 - 56864 (2015/07/15)
In view of designing a new class of photoswitchable fluorescence probes and operating them in solution as well as on solid substrates, we have envisioned the possibility of attaching photochromic spiropyran (SP) to the highly efficient fluorophore oligo(p
Effect of the bulkiness of the end functional amide groups on the optical, gelation, and morphological properties of oligo(p-phenylenevinylene) π-gelators
Babu, Sukumaran Santhosh,Praveen, Vakayil K.,Kartha, Kalathil K.,Mahesh, Sankarapillai,Ajayaghosh, Ayyappanpillai
, p. 1830 - 1840 (2014/07/08)
Herein, we describe the role of end functional groups in the self-assembly of amide-functionalized oligo(p-phenylenevinylene) (OPV) gelators with different end-groups. The interplay between hydrogen-bonding and π-stacking interactions was controlled by the bulkiness of the end functional groups, thereby resulting in aggregates of different types, which led to the gelation of a wide range of solvents. The variable-temperature UV/Vis absorption and fluorescence spectroscopic features of gelators with small end-groups revealed the formation of 1D H-type aggregates in CHCl3. However, under fast cooling in toluene, 1D H-type aggregates were formed, whereas slow cooling resulted in 2D H-type aggregates. OPV amide with bulky dendritic end-group formed hydrogen-bonded random aggregates in toluene and a morphology transition from vesicles into fibrous aggregates was observed in THF. Interestingly, the presence of bulky end-group enhanced fluorescence in the xerogel state and aggregation in polar solvents. The difference between the aggregation properties of OPV amides with small and bulky end-groups allowed the preparation of self-assembled structures with distinct morphological and optical features. Buying in bulk: OPV amides with small end-groups self-assemble into 2D/1D aggregates in toluene and 1D aggregates in CHCl3. Bulky end-groups impede fluorescence quenching in the self-assembled state by blocking π-stacking and facilitate morphological transition in THF.
Soluble narrow band gap and blue propylenedioxythiophene-cyanovinylene polymers as multifunctional materials for photovoltaic and electrochromic applications
Thompson, Barry C.,Kim, Young-Gi,McCarley, Tracy D.,Reynolds, John R.
, p. 12714 - 12725 (2008/02/05)
A family of soluble narrow band gap donor-acceptor conjugated polymers based on dioxythiophenes and cyanovinylenes is reported. The polymers were synthesized using Knoevenagel polycondensation or Yamamoto coupling polymerizations to yield polymers with molecular weights on the order of 10 000-20 000 g/mol, which possess solubility in common organic solvents. Thin film optical measurements revealed narrow band gaps of 1.5-1.8 eV, which gives the polymers a strong overlap of the solar spectrum. The energetic positions of the band edges were determined by cyclic voltammetry and differential pulse voltammetry and demonstrate that the polymers are both air stable and show a strong propensity for photoinduced charge transfer to fullerene acceptors. Such measurements also suggest that the polymers can be both p- and n-type doped, which is supported by spectroelectrochemical results. These polymers have been investigated as electron donors in photovoltaic devices in combination with PCBM ([6,6]-phenyl C61-butyric acid methyl ester) as an electron acceptor based on the near ideal band structures designed into the polymers. Efficiencies as high as 0.2% (AM1.5) with short circuit current densities as high as 1.2-1.3 mA/cm2 have been observed in polymer/PCBM (1:4 by weight) devices and external quantum efficiencies of more than 10% have been observed at wavelengths longer than 600 nm. The electrochromic properties of the narrow band gap polymers are also of interest as the polymers show three accessible color states changing from an absorptive blue or purple in the neutral state to a transmissive sky-blue or gray in the oxidized and reduced forms. The wide electrochemical range of electrochromic activity coupled with the strong observed changes in transmissivity between oxidation states makes these materials potentially interesting for application to electrochromic displays.
A convenient synthetic route to 2,5-dialkoxyterephthalaldehyde
Shao, Pin,Li, Zhen,Luo, Jianlin,Wang, Hongli,Qin, Jingui
, p. 49 - 53 (2007/10/03)
A convenient method for synthesizing 2,5-dialkoxyterephthalaldehyde by oxidation of 1,4-dialkoxy-2,5-bis(halogenomethyl)benzene with dimethyl sulfoxide in one step is described.
Ruthenium-catalyzed knoevenagel condensation: A new route toward cyano-substituted poly(p-phenylenevinylene)s
Liao, Jian,Wang, Qing
, p. 7061 - 7063 (2007/10/03)
The ruthenium-catalyzed Knoevenagel reaction was developed for the preparation of cyano-substituted conjugated polymers. The polymerization was quenched by pouring the reaction mixture into methanol. The structures of polymers were confirmed by spectroscopic studies and elemental analysis. The results show that Knoevenagel polycondensation mediated by transition metal complexes enjoys the advantages of neutral and mild reaction conditions.
Green-blue photoluminescence from a novel silicon-containing alternating copolymer
Chen, Zhi-Kuan,Lai, Yee-Hing,Chan, Hardy Sze-On,Ng, Siu-Choon,Huang, Wei
, p. 477 - 478 (2007/10/03)
A novel silicon-containing copolymer with an alternating structure, poly[(5-decyldimethylsilyl-1,3-phenylenevinylene)-alt-(2,5-didodecyloxy-1,4-phen ylenevinylene)], is synthesized through the Wittig reaction. The polymer is a promising green-blue emissiv
Well-defined polynuclear iron(II) complexes bridged by back-to-back ligands
Kimura, Mutsumi,Horai, Takashi,Muto, Tsuyoshi,Hanabusa, Kenji,Shirai, Hirofusa
, p. 1129 - 1130 (2007/10/03)
Novel linear high-molecular-weight polynuclear iron (II) complex has been synthesized using a new bridging ligand in which two 2, 2′: 6′, 2″-terpyridine have connected by a 1, 4-pheneylene spacer having long alkyl chains.
